Calculation of pile-soil stress ratio in composite foundation with rigid pile-net based on plate theory
YAN Shuwang1，LANG Ruiqing1，SUN Liqiang1，CHEN Jing1，JIA Zhaolin1，2，3
(1. State Key Laboratory of Hydraulic Engineering Simulation and Safety，Tianjin University，Tianjin 300072，China；2. Huadian Heavy Industries Co.，Ltd.，Beijing 100070，China；3. Key Laboratory of Soft Soil Engineering Character and Engineering Environment of Tianjin，Tianjin Chengjian University，Tianjin 300384，China)
Abstract：The pile-soil stress ratio is an important indicator which reflects the characteristic of composite foundation with rigid pile-net. The pile-soil stress ratio of the composite foundation with rigid pile-net under the embankment loads was studied based on the load transfer characteristics. The reinforced area was considered as a whole body according to the stress and displacement continuity condition of cushion-piles-soil. The stress and deformation of reinforced cushion were simulated with the large deflection theory of thin plate. The real boundary conditions of the reinforced cushion were considered. The pile-soil stress ratio was solved with the assumption that the four corners were simple supported and the rest were free. The method for calculating the pile-soil stress ratio under normal conditions considering the effect of pile-soil interaction was deduced through the principle of energy. The method was validated through the indoor full scale tests. The influences of the modulus of mattress layer，pile spacing，soil bed coefficient and pile diameter on pile-soil stress ratio were systematically analyzed. The analytical solutions agree with the measured data.
闫澍旺1，郎瑞卿1，孙立强1，陈 静1，贾沼霖1，2，3. 基于薄板理论的刚性桩网复合地基桩土应力比计算[J]. 岩石力学与工程学报, 2017, 36(8): 2051-2060.
YAN Shuwang1，LANG Ruiqing1，SUN Liqiang1，CHEN Jing1，JIA Zhaolin1，2，3. Calculation of pile-soil stress ratio in composite foundation with rigid pile-net based on plate theory. , 2017, 36(8): 2051-2060.